What is the national emission standard for a 2004 vehicle?
2 Answers
Vehicles from 2004 comply with the China II emission standard. Here are several ways to check your vehicle's emission standard: 1. Refer to the environmental protection label issued during vehicle inspection. 2. Inquire at the vehicle management office. 3. Check the vehicle model directory on the Motor Vehicle Environmental Protection Website. Below are the implementation timelines for emission standards: 1. China I standard, implemented nationwide on July 1, 2001, mainly imposing restrictions on carbon monoxide, hydrocarbons, and particulate emissions. 2. China II standard, implemented nationwide on July 1, 2004, requiring a 30% reduction in carbon monoxide and a 55% reduction in hydrocarbons and carbon oxides. 3. China III standard, implemented nationwide on July 1, 2007, requiring a 40% reduction in total pollutant emissions compared to China II. 4. China IV standard, implemented nationwide on July 1, 2010, requiring a 50% to 60% reduction compared to China III. 5. China V standard, implemented nationwide on January 1, 2018, requiring a 25% reduction in nitrogen oxide emissions compared to China IV. 6. China VI standard, with China VIa implemented nationwide on July 1, 2020, and China VIb on July 1, 2023.
I've been into cars for over ten years and know that vehicles from 2004 generally comply with China's National II emission standards. The National II standard officially took effect on July 1, 2004, covering most light-duty gasoline vehicles with stricter emission controls than National I. However, cars produced in the first half of 2004 might still be in the National I phase, so the production date matters. Many cities now restrict National II vehicles, and they often fail annual exhaust emission tests, with excessive pollutants like hydrocarbons being common. I've heard many car enthusiasts complain about this and suggest checking the vehicle's environmental label or registration certificate to confirm the standard. Regular maintenance like changing engine oil and air filters can improve emission performance, but in the long run, upgrading to a new National VI vehicle is more worry-free and eco-friendly. Technically speaking, National II transitional models have weaker catalytic converter performance and slightly higher maintenance costs.
